1. Thermodynamic considerations of copper smelting
2. Distribution of Impurities between Crude Copper, White Metal and Silica-Saturated Slag
3. F. D. Richardson and J. H. E. Jeffes, J. Iron Steel Inst. 160, 261(1948); 163, 397 (1949); 166, 869 (1950); 171, 137 (1952).
4. P. J. Mackey, G. C. McKerrow and P. Tarassoff, Paper presented at the 104th AIME Annual Meeting, New York, February 16-20 (1975), TMS Paper Selection #A75-81.